Only 55% is required? I’m all for regions that wish to be independent to have the power to peacefully choose to do so.... but sticking 45% of a population with a new government that they didn’t want or choose seems really high. I would think that the requirement should be at least 65%, more likely 75% or higher. A super-majority, at least, for such an extreme course of action.... and maybe also a clause that says that they cannot be readmitted for 10 years, and readmittance would come with numerous penalties and costs.
It sounds like a recipe for major resistance.